Kang Jie, Zhang Yan, Wu Yali, Wang Zhiping, Li Wenjuan, Li Qiang, Li Huan, Cao Yueping, Xu Songhe, Ning Yangcui, Meng Xiangfeng
College of Chemistry and Chemical Engineering, Jining Normal University, Wulanchabu, 012000, China.
Key Laboratory for Soil Modification and Comprehensive Utilization of Mineral Soil of Inner Mongolia Autonomous Region, Jining Normal University, Wulanchabu, 012000, China.
J Fluoresc. 2024 Oct 7. doi: 10.1007/s10895-024-03974-5.
Two novel Tb(III) ternary complexes, [Tb(Phen)(p-BrBA)] and [TbY(Phen)(p-BrBA)], have been synthesized with p-bromobenzoic acid(p-BrBA) as the primary ligand and 1,10-phenanthroline(Phen) as the secondary ligand. The structures of these complexes are characterized by elemental analysis, IR spectroscopy, UV-vis absorption spectroscopy, thermal analysis (TGA) and single-crystal X-ray diffraction. The crystal structures of the compounds are similar because of similar radii of Tb ion and Y ion. Both the homobimetallic single crystal and the heterobimetallic single crystal belong to the monoclinic system. The results show that both complexes have excellent luminescence properties, including luminescent intensity, luminescent lifetime and quantum yield. The two compounds have an excited state lifetime of milliseconds and the photoluminescence quantum efficiencies of the two terbium complexes can exceed 100% upon excitation to their 5d states in theory, which is attributed to luminescent lifetime and quantum cutting (QC). Furthermore, the luminescent properties of [TbY(Phen)(p-BrBA)] are actually superior to those of [Tb(Phen)(p-BrBA)].
以对溴苯甲酸（p-BrBA）作为主配体、1,10-菲啰啉（Phen）作为次配体，合成了两种新型的铽（III）三元配合物，即[Tb(Phen)(p-BrBA)]和[TbY(Phen)(p-BrBA)]。通过元素分析、红外光谱、紫外可见吸收光谱、热分析（TGA）和单晶X射线衍射对这些配合物的结构进行了表征。由于铽离子和钇离子半径相似，这两种化合物的晶体结构相似。同双金属单晶和异双金属单晶均属于单斜晶系。结果表明，两种配合物均具有优异的发光性能，包括发光强度、发光寿命和量子产率。这两种化合物的激发态寿命为毫秒级，理论上，两种铽配合物在激发到其5d态时的光致发光量子效率可超过100%，这归因于发光寿命和量子剪裁（QC）。此外，[TbY(Phen)(p-BrBA)]的发光性能实际上优于[Tb(Phen)(p-BrBA)]。
